Schema yaml validation

Example project of parsing yaml files into Rust types via serde and validating the yaml documents in VSCode (requires the yaml extension) by generating JSON schema to lint the YAML in the build.rs script.

How does this work

1. Rust types are defined in the ./types crate. The types derive serde::Deserialize and schemars::JsonSchema.
2. The program ./program/build.rs file generates a JSON Schema from the type into ./program/schemas
3. The .vscode/settings.json file references the program/data/example.yaml data file and the schema to validate against
4. VSCode will now validate the example.yaml file automatically when edited
5. The program to load the yaml file into a Rust struct can be called via cargo run program

Some possible improvements

• Generate the .vscode/settings.json config for 'yaml.schemas' inside the build.rs script
• Update program/build.rs to read Rust types generically from a directory (parse using syn) or referenced from the yaml file
• Create git hooks to validate the yaml based on the generated JSON Schema or Rust types